It seems like every exam I’ve given I scramble to find a clear and easy-to-use clock and countdown timer. (I like to project these in the lecture hall so students can pace themselves (or panic, as appropriate, when time is running short).) So I whipped up one of my own. Displays current time on the left, and the remaining time in a “1h 2m” remaining format. Also sweeps out a decreasing arc of brain as the time decreases.
Feel free to use, adapt, steal as you please.